C99语法之初始化结构体

#include<stdio.h>
#include<stdlib.h>

struct MyStruct
{
    int num;
    float fl;
    double db;
    _Bool b;//c99新增的bool类型 1，0

}my1 = { .num = 10, .fl = 10.9, .db = 19.8, .b = 0 };//初始化的形式


void main()
{

    printf("%d,%f,%f,%d", my1.num, my1.fl, my1.db, my1.b);

    struct MyStruct  my2 = (struct MyStruct){ .num = 10 };//默认会清零
    printf("\n%d,%f,%f,%d", my2.num, my2.fl, my2.db, my2.b);

    getchar();


    //不能用变量直接初始化，需要用结构体初始化的方式直接初始化一个结构体变量
    struct MyStruct *p = (struct MyStruct[])
    {
        [0] = { .num = 10, .fl = 10.9, .db = 19.8, .b = 0 },
            [1] = { .num = 10 }
    };

    getchar();
}